GoAffPro provides you with the option to prevent affiliates from getting credited with two commissions for a sale. This can happen, if the affiliate who has a fixed commission setup, also refers the sale.
To prevent affiliates from getting credited with two commissions for a sale, go to the Royalties (Fixed commissions) section of the Commissions tab in the GoAffPro admin panel.
Here, you will be able to view the fixed commission that has been set up.
Now, in the All Sales section of the Sales tab, you will see two entries with the same order number.
After this, go to the Referral Commissions section of the Commissions tab in the GoAffPro admin panel.
Here, click on New Product Commission in the Product Commissions section.
Now, set up the product commission with the same product (as in the fixed commission), select the affiliate, and set the commission rate to zero.
After this, click on Save.
You will be able to view the newly set product commission in the Product Commissions section.
Finally, you will see that the affiliate will now receive only one commission, which is the fixed commission.